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ST10F273E Datasheet(PDF) 71 Page - STMicroelectronics |
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ST10F273E Datasheet(HTML) 71 Page - STMicroelectronics |
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71 / 179 page  ST10F273E Serial channels 71/179 Note: The deviation errors given in the Table 43 and Table 44 are rounded. To avoid deviation errors use a Baud rate crystal (providing a multiple of the ASC0 sampling frequency) 15.4 High speed synchronous serial interfaces The High-Speed Synchronous Serial Interfaces (SSC0 and SSC1) provides flexible high- speed serial communication between the ST10F273E and other microcontrollers, microprocessors or external peripherals. The SSCx supports full-duplex and half-duplex synchronous communication. The serial clock signal can be generated by the SSCx itself (master mode) or be received from an external master (slave mode). Data width, shift direction, clock polarity and phase are programmable. This allows communication with SPI-compatible devices. Transmission and reception of data is double-buffered. A 16-bit Baud rate generator provides the SSCx with a separate serial clock signal. The serial channel SSCx has its own dedicated 16-bit Baud rate generator with 16-bit reload capability, allowing Baud rate generation independent from the timers. Table 45 and Table 46 list some possible Baud rates against the required reload values and the resulting bit times for 40 MHz and 64 MHz CPU clock respectively. The maximum is anyway limited to 8Mbaud. 900 0.0% / 0.0% 15B2 / 15B3 600 0.0% / 0.0% 15B2 / 15B3 612 0.0% / 0.0% 1FE8 / 1FE9 407 0.0% / 0.0% 1FFD / 1FFE Table 43. ASC synchronous baud rates by reload value and deviation errors (fCPU = 40 MHz) S0BRS = ‘0’, fCPU = 40 MHz S0BRS = ‘1’, fCPU = 40 MHz Baud rate (Baud) Deviation error Reload value (hex) Baud rate (Baud) Deviation Error Reload value (hex) Table 44. ASC synchronous baud rates by reload value and deviation errors (fCPU = 64 MHz) S0BRS = ‘0’, fCPU = 64 MHz S0BRS = ‘1’, fCPU = 64 MHz Baud rate (Baud) Deviation error Reload value (hex) Baud rate (Baud) Deviation error Reload value (hex) 8 000 000 0.0% / 0.0% 0000 / 0000 5 333 333 0.0% / 0.0% 0000 / 0000 112 000 +0.6% / -0.8% 0046 / 0047 112 000 +1.3% / -0.8% 002E / 002F 56 000 +0.6% / -0.1% 008D / 008E 56 000 +0.3% / -0.8% 005E / 005F 38 400 +0.2% / -0.3% 00CF / 00D0 38 400 +0.6% / -0.1% 0089 / 008A 19 200 +0.2% / -0.1% 019F / 01A0 19 200 +0.3% / -0.1% 0114 / 0115 9 600 +0.0% / -0.1% 0340 / 0341 9 600 +0.1% / -0.1% 022A / 022B 4 800 0.0% / 0.0% 0681 / 0682 4 800 0.0% / -0.1% 0456 / 0457 2 400 0.0% / 0.0% 0D04 / 0D05 2 400 0.0% / 0.0% 08AD / 08AE 1 200 0.0% / 0.0% 1A09 / 1A0A 1 200 0.0% / 0.0% 115B / 115C 977 0.0% / 0.0% 1FFB / 1FFC 900 0.0% / 0.0% 1724 / 1725 652 0.0% / 0.0% 1FF2 / 1FF3 |
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